This U-V pond light for koi pond is available in 30W , tailored for aquarium systems of different sizes and water types, allowing you to flexibly choose according to actual needs to avoid over-configuration or insufficient purification. Suitable for freshwater and seawater environments, whether it is a breeding pond, koi pond or tropical fish tank, it can do the job. Product name: Aquarium green clean light Product material: quartz glass Product color: Clear Product quantity: 1x fish tank U-V lamp, 1x timer. Features: 1. Support multiple timing modes (3H, 6H, 12H, 24H), easy to manage. The timer is equipped with a convertible plug to adapt to a variety of socket types and support multi-regional use. 2. Whether you have a small aquarium, a home fish pond, or a large pond, this U-V cleaning light can operate efficiently and provide a healthier living environment for your fish and aquatic plants. 3. The aquarium lights for fish tank is equipped with a 12.5ft (about 3.8m) long power cord, which provides users with greater installation flexibility and is suitable for most aquarium environments.